Type-writer escapement.



L. P. DISS.

TYPE WRITER BSGAPEMENT.

APPLICATION FILED sBPT.s,191o

1,021,182. Patented Mar.26,1912.

wnwzssis: l INVENTOR Louis P. Diss emu ATTORNEYS UNITEDSTATESHPATENT OFFICE i To aZZ whom "it may 0011002 72.:

'2-2 of Fig. 1. Fig.

LOUIS P. DISS, OF ILlTON, NEW YORK.

TYPE-WRITER ESCAPEMENT.

Be it known that 1, Louis P. Diss, of ]lion, in the county of llerkinler and State of New York, have invented certain new and useful I1n n-oveinents in 'lype-Writer l lscapements; and T do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to which it QLI'JPGltzllIlS to make and use the same, reference being had to the accompanying drawings, and to the reference-nui'nerals marked thereon, which form part of this specification.

The object. of my invention is to provide a more speedy and more suitable typewriter escapenient for the ordinary operator than has heretofore been provided. For this purpose I have provided for the release oil. the carriage instantaneously with the coinlueneenicnt. of the return movement of the type from the platen, and for a greater re- .pulsing effect of the carriage spring on the type bars and finger keys than has heretofore been provided.

A further object of my invention is to provide for readily converting this-escapenient from its regular action to what is known as a reverse acting escapement which is only suitable for expert operators. In this class of escapement; the carriage is released before the type reach'the platen, thereforethe regularity of spacing. depends on the uniform operation of the finger keys.

Figure 1, is a vertical sectional view-look- I 0 ing from front to back of part of a type writer embodying my form of escapen'ient. Fig. 2, is a vertical 3, is a horizontal sectional view on line 3-3' of Fig. 1. Fig. 4, isa view similar to Fig. 1 of a modified fornu Fig. is a vertical sectional view on line 5-5 of F ig.4. Fig. 6, is a front elevation of the dog rocker. Fig. 7, is a plan views; the do rocker. Fig. 8, is a perspec tive view of t e holding dog 24, the rock shaft 23, and the arms25 and 26. Fig. 9, is a perspectiveview of the spacing dog.

The escapem'ent wheel 10 having the usual teeth 11, is mounted to'revolve in a vertical plane par-allelic the line. of the movement of the carriage and operatively connected therewith and with the main spring in the usual well known manner, not shown in the drawings. The tension of the main spring is to revolve the ,escapement wheel inthc sectional view on l'ineof arm 25 is pivotally connected end of the wlre 27 Specification of Letters Patent. Patented B131, 26, 1912, Application tiled September 3, 1910. Serial No. 580,389.

direction indicated thereon in the drawing by an arrow.

The dog rocker 12 is mounted on pivots 13 supported by posts 14 and 15 extending down from the top plate 16. The axis of the dog rocker is of the escapement wheel. Pivotally niounted at 17 on the dog rocker 12 and having its pi votalaxis at right angles with the axis otthe dog rocker, is the stepping orspacan opening in the top plate 16 and engages a tooth 11 of' the escapeinent wheel when the machine is not being operated which is the position of the parts in Figs. 1-5,and

at right angles to the axis" ing dog 18whieh extends upwardly through which for convenience T will call the normal position. A shoulder 19 upon the dog rocker limits the movement of the spacing dog 18 in its movement toward the rightas shown in Figs. 1 and 4.- at a pointwhere the spacing dog will hold one escapement wheel 10 at desired position in the usual manner. A spring 20 secured to the rocker 12,.bears upon the spacingdog so as to throw it toward the left as viewed in Figs. 1 and 4, when the of the teeth 11- of the rocking movcment of the rocker 12 carries the spacing dog out of engagement with the escapenient wheel. A stop 21 upon the rocker liinits this movement- .of the spacing dog at the de sired point. A spring the post 14; and the rocker 12 is tensioned to force the rocker to swing on its axis to normal position, viz: to the position, where the spacing dog 18 is in line to engage the teeth of the 'escapeinent wheel as in Figs. 1- 5.

hearing against Pivotally mounted upon arms 34 and .35

outwardly extendingfrom the dog rocker l2 and having their ends bent upward. is a rock shat't QB, gles with the axis of the dog rocker. this rock shaft 23 the holding having its axis at right. an Upondog iitqsdo? Gated and extends upward sutiiciently total low of engagement with the escapc uient wheel 10. This rock shaft extends beyond the axis of the dog rocker upon the side op-i posite the holding with an arm 25 extending to the left as viewed in Figs. 1 and 4,

and in the form shown in,

dog and is there provided. V

Figs. 1- 3, also with an tarm 26 extending to.

the right as viewed in Fig. 1. To the end the upper the'hent end of which enters a hole ire-acthe end, oi, tlie-ar g25illl and is held therein by a spring holder 28 secured to the wire 27. This spring fastening allows the .wire 27 to be readily disconnected from the arm 25 and connected to the opposite arm 26 which also has a hole for the bent end of the wire, for the purpose set out fully hereafter. The lower end of the wire 27 is connected to one end of a bell crank 29 pivoted upon arms 30 secured to the base plate 31 and by means of this bell crank 29 connection is made in the usual way, not shown, to the key lever and universal bar, in such manner that a depression of the finger keys will cause a downward pull on the wire 27.

The movement of the holding dog 24 toward the right as shown in Figs. 1 and 4,

that is its motion when returned to normal position of rest, is limited by a stop 32 upon the dog rocker 12. A shoulder 33 upon the rocker arrests the forward motion of the holding dog 24 when its engaging face has been brought into .line with the tooth 11, then engaged by the spacing dog. Ears 36 and 37 project from the dog rocker 12 and limit the rocking movement of the dog rocker in either direction by their coming in contact with stop screws 38 and 39 respectively mounted in a post 40 depending from the top plate 16. It is now evident that when thefinger keys are manipulated a downward pull will be communicated to the wire 27, and to the 'arm 25, and this will more the holdingdog 24-toward the escapement wheel or to the left as shown in Figs. 1 and 4, until by shoulder 33 the holding dog is stopped with its face in line'with the face of the spacing dog 18 and in line also with the face of the tooth 11 then engaged by the spacing dog. The downward pressure upon the arm 25 will also rock the dog rocker 12 upon its pivots 13 and thereby swin the spacing dog 18 out of engagement with tooth 11 of the esca )ement wheel, and will swing the holding 0g 24 into engagement with the same tooth. As soon as the spacing dog 18 is out of engagement withthe tooth of the escapement wheel, it is forced forward by the spring 20 ready to engage the next tooth of the escapement wheel'as soon as the dog rocker is allowed to swing back toward normal position. During the the Y downward pressure upon the finger, key, thetype has come to printing position on the platen and then justas soon as the downward pressure upon the finger key is released, the holding dog 24 is free to be forced backward by the engaged tooth of the escapement wheel and the tension of the main sp'ringlexerted through this tooth does at once force the holding dog 24 back toward its normal position. The release of the pressure upon the finger key also meanwhile allows-the sprin 22 to return the dog rocker 12 to norma position, and

ing and avoid smutting by the average opthereby again bring the spacing dog 18 into engagement with the escapeinent wheel and withdraw the holding dog 24 entirely from engagement therewith. The advantage of my invention is that the escapement motion begins instantaneously with the release of pressure upon the finger key and does not have to wait for the holding dog to be moved out of the path of the escapement member, but the holding dog is itself forced backward while it is being withdrawn from the path of the escapement member.

The modification shown in Figs. 4 and 5 consists in substituting for the spring 22, a spring 42 coiled about a pin 41 projecting from the post 14, the free end 48 of the. spring 42 being hooked into the arm 25 and exerting an upward tension thereon. This connection of the spring tends to swing the holding dog 24 backward before swinging the dog rocker 12 toward its normal position. It 'will also be'observed that in my form of escapement, the carriage main springwill move the holding dog backward simultaneously with the commencement of the return of the type from platen withouthaving the carriage main spring move the dog rocker, so that the repulsion and return of the keys to normal position is effected directly through the holding dog. By this arrangement the dog rocker or escapement member ofiers no resistance ,to the main spring and does not retard the feed of the carriage.

It will be seen that while I have shown my improvement only in connection with, an escapeliient wheel, which is'connected with the letter spacing rack of the carriage in the usual manner, it may be connected directly with the letter spacing rack. The release 'of the, carriage simultaneously with the commencement of the return movement of the type from 1ts platen is the earliest ear- 1 rlage release which Wlll insure regular spacerator. But there are operators who are so rapld and whosemanipulationof the tinger keys is so regular that the carriage may be released before the type ,reach the platen and still ell'ect regular spacing. ljor this purpose I have provided the arm 26 by means of which the eseapement can be readily changed from what is known as the regular escapement heretofore described, to a reverse acting escapemcnt, by disconnecting the wire 27 from arm 25 and coninxrting the wireto arm 26 shown in Figs. 1, 2, 3 and 8. By-this arrangement the holding dog 24. will normally assume a position with its face in line with the face'of the spacing (log 18 and the first part.- of the depression of the finger key will elt'ect theswinging of the holding dog from its normal position, back to the right to the position'shown in Figs. 13, after which the dog rocker 12 will swing 130 member and means for first moving said holding dog parallel to said escapement member into line to'engage the same, then for moving said dog rocker to bring said holding dog into engagement with and hold said escapement member from any movement from printingposition during pressure upon said means and, upon release of such pressure allowing simultaneous reverse movements of said holding dog.

10. In a typewriting machine, a letter spacing escapement consisting of a toothed spacing member, a dog rocker, a spacing dog and a holding dog mounted on the dog rocker and adapted to movewith and in the path of the toothed spacing member and to be alternately swung out of said path by movement of the dog rocker, a spring tensioned to return the dog rocker to normal position, arms on opposite sides of the axis of the holding dog and adapted to form a regular acting escapeme'nt when connection with the key levers is made to'one'of said arms and to form a reverse acting escapement when connection is made to the other arm.

11. In a typewriting machine, a letter spacing escapement having a toothed escapement member, a spacing dog and a holding dog cooperating with the toothed escapement member, the holding dog being arranged to move with the toothed escapement member in its path, and being connected to the finger keys whereby during the first part of their depression, the holding dog will assume a position to hold the carriage in its normal position, and a further depression will effect the release of the spacing dog without releasing the carriage. and whereby the removal of the pressure on the finger keys will effect instantaneous release of'the carriage.

12. The combination in a letter spacing escapement for a typewriting machine of a toothed escapement member, a spacing dog, a holding dog adapted to be moved into and out of the path of the eseapement member and adapted to move in the path of the cscapement member and connections from said holding dog to the key levers whereby depression of a key lever holds said escapement member continuously from any movement from printing position during pressure upon the linger keys.

13. The combination in a letter spacing eseapemeut for a t v w\vriting machine of a toothed escapemeut member,- a spacing dog. a holding dog adapted to be moved into and out of the path of the escapemeut member and adapted to move in the path of the escapement memberand connections from said holding dog to the key. levers whereby depression of a key levermoves the holding dog against the escapement member and thereby holds said escapcment member con:

said holding dog to the tinuously from any movement from printilng position during pressure upon the finger eys- 1 14. The combination in a letter spacing escapement for a typewriting machine of a toothed escapement member, a spacing dog, a holding dog adapted to be moved into and out of the path of the escapement member and adapted to move in the path of the escapement -member and connections ,from key levers whereby depression of a key lever holds said escapemcnt member continuously from any movement from printing position during pressure upon the finger keys and allows movement of the escapement member instantaneously with the beginning of the release of pressure upon the key lever.

15. The combination in a letter spacing escapement for a typewriting machine of a toothed escapement member, a spacing dog, a holding dog adapted "to bemoved into and out of the path of the escapement member and adapted to move in the path of the escapement member and connections from said holding dog to the key levers whereby depression of a key lever moves the holding dog against the eseipement member and thereby holds said escapement member continuously from any movement from printing position during pressure upon the finger keys, and allows movement of the escapement member instantantamsly with the beginning of release of the pressure upon ,the key lever.

16. The combination in a letter spacing escapement for a typewritiug machine of a toothed escapement member. a spacing dog, a holding dog adapted to move in the path of the eseapement member. a dog support adapted to carry said dogs into and out of the path of the escapemeut member and connections from said holding dog to the key levers whereby depression of a key lever moves the holding dog into engagement with the escapement member and thereby holds-said eseapement member continuously from any movement from printing position during pressurb upon the finger keys and allows movement of said escapemeut member instantaiwously with the release of pressure upon the key lever.

.17. The combination in a letter spacing escapement for a ty1)c\\-'1'itiiig machine of a toothed eseapeinent member, a spacing dog normally engaging the escapement member, a holding dog adapted to move in the path of the escapement member. a dog support adapted to carry said dogs into and out of the path of the escapement' member, connections fromsaid-holding dog to the key levers whereby depression of a key lever mally out of engagement with said escapement member, asupport for said dog having a movement to carry said dogs respectively out of and into the path of said escapement. member, means including an arm on said holding dog and connections therefrom to the finger keys for first moving said holding dog in a path parallel to the plane of said escapement member and then for moving said dog support whereby said holding dog is brought into engagement ith said escapement member.

26. In a letter spacing escapement for a typewriting machine, a toothed escapement member, a spacing dog normally holding said escapement member, a holding dog normally outof engagement with said escapement member, a support for said dog having a movement to carry said dogs respectively out of and into the path of said escapement member, means including an arm on said holding dog and connections therefrom to the finger keys for first moving said holding dog in a path parallel to the plane of sald escapement member and stantaneously with the release of such pres-v sure. 1

In witness whereof. I have aflixed my signature, in the presence of two Witnesses, this 26th day of August 1910.

LOUIS P. DISS. Witnesses:

HARRIET WmLIA'Ms, E. M. DUFFY. 

